The HOBO MX2204 TidbiT waterproof temperature logger leverages the power of Bluetooth Low Energy (BLE) to deliver high-accuracy temperature measurements straight to your iOS or Android mobile device. Designed for durability, this rugged waterproof logger is ideal for long-term deployments in streams, lakes, and oceans. Data collection in the field has never been easier!
Convenient wireless setup and download via Bluetooth Low Energy (BLE)
Large memory stores 96,000 measurements
Waterproof to 1500 meters (5000 feet)
Waterproof boot protects the logger during deployment
LED alarm notifies you when temperature exceeds set threshold
Water detection feature conserves battery life
Works with Onset’s free HOBOmobile app
±0.2°C (±0.36°F) accuracy
In what environment does this data logger operate?
This data logger operates in indoor, outdoor and underwater environments.
What measurements does this data logger support?
The MX2204 data logger supports the following measurements: Temperature and Water Temperature
Temperature Sensor (MX2203 and MX2204)
MX2203: -20° to 70°C (-4° to 158°F) in air; -20° to 50°C (-4° to 122°F) in water
MX2204: -20° to 70°C (-4° to 158°F) in air; -20° to 50°C (-4° to 122°F) in water, maximum sustained temperature in water 30°C (86°F)
±0.25°C from -20° to 0°C (±.45°F from -4° to 32°F)
±0.2°C from 0° to 70°C (±0.36°F from 32° to 158°F)
Drift：<0.1°C (0.18°F) per year
MX2203: 17 minutes typical to 90% in air moving 1 m/s, unmounted; 7 minutes typical to 90% in stirred water, unmounted
MX2204: 15 minutes typical to 90% in air moving 1 m/s, unmounted; 4 minutes typical to 90% in stirred water, unmounted
Radio Power：1 mW (0 dBm)
Transmission Range：Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard：Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)
Logger Operating Range：-20° to 70°C (-4° to 158°F)
Logging Rate：1 second to 18 hours
Buoyancy (Fresh Water)：
MX2203: 3.1 g (0.11 oz) negative
MX2204: 7.6 g (0.27 oz) negative
MX2203: To 122 m (400 ft)
MX2204: To 1,524 m (5,000 ft)
Water conductivity level of 100 µS/cm or greater necessary for reliable detection of water. Deionized water or water below 100 µS/cm may not be detected.
The water conductivity circuit may not reliably detect water that has frozen around the electrodes, i.e. below 0°C (32°F).
Battery：CR2477 3V lithium, user replaceable in MX2203, non-replaceable in MX2204
3 years, typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off disabled in software.
5 years, typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off or Bluetooth Off Water Detect enabled in software.
Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life.
To ensure proper battery installation, see Battery Information for detailed instructions on replacing the battery in the MX2203 logger.
Time Accuracy：± 1 minute per month at 25°C (77°F)
Full Memory Dowload：Approximately 45 seconds; may take longer the farther the device is from the logger
MX2203: Polypropylene case, EPDM O-ring, stainless steel screws, Santoprene® (TPE) boot
MX2204: Epoxy case, Santoprene (TPE) boot
MX2203: 4.45 x 7.32 x 3.58 cm (1.75 x 2.88 x 1.41 inches)
MX2204: 4.06 x 6.99 x 3.51 cm (1.6 x 2.75 x 1.38 inches)
MX2203: 36.2 g (1.28 oz)
MX2204: 32.8 g (1.16 oz)
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.